I can never get the courage to talk to a crush and Im sick of it

This girl, calling her Tam (14F), I met at a lacrosse thing back in the fall. I (15F)thought she was a guy at first, short hair and baggy clothes from a distance, so I didnt think much of her. But then I discovered she was on my team. She turned around. And shit she was the prettiest girl I had ever seen to the point I just malfunctioned. She seemed to do the same too, given our introduction was just saying hi back and forth 5 times, and I later discovered that shes the opposite of awkward, and she seemed kinda nervous and smiling weirdly big when she saw me. After that, Tam just became a hallway crush (no real feelings because I didnt actually know anything about her) Until she joined the schools lacrosse team.
We talked during warmups, but nothing much, just small talk, since shes super talented and made varisty as a freshman. (Im a sophomore) and I got to see how goofy and confident she is. And one day when she appeared at one of JV’s games and I saw her while I was in goal (were both goalies) 🎇heart flutters🎇

At first I panicked, because shes a teammate and I can’t have feelings for a teammate. Also, I dont know if shes into girls. This was initially why I didnt make any moves. My friend laughed at me when I said i couldnt know if she was into girls because “Shes a theater kid with tomboy hair” Which, yeah is a stereotype, but she does give off lesbian vibes in other ways. And im still not sure about the teammate thing, it could definitely cause drama if it were to happen.

Anyway. I decided to try and get her phone number because I find it a lot easier and more comfortable to get to know someone over text. I started by trying more interesting conversations. That failed because I’m still working on my social skills. Also, aparently most of my friends thought that I hated them at first, i still dont know why thats just what they tell me, and I really hope thats not the case for her. But back to the point. The JV season end came pretty close and we dont have any classes or mutual friends so, i decided to get my crap together and just ask. I could never bring myself to do it. Every freaking time I had the chance Id make up an excuse and go home.

The season ended, I hated myself for being such a wuss. Then i saw her, sitting alone in the room she hangs out in after school. Literally the PERFECT oppurtunity to talk to her. My friend was shoving me to go. I dont know why but I just couldn’t. My legs were wably my stomach cramped and my friend said I was looking “hella pale”. I went home.

I’m just so frustrated with myself. She was right there. Im never going to get an opportunity like that again. I only ever see her in the halls when theres not enough tjme to talk. I pass by her usual hangout and theres always a large group of her friends there with her. This sort of thing happened with all my past crushes too, I could never get up the courage to talk to them. Im sick of this trend. Im sick of being like this but I dont know how to fix it or where to start. And i want break the cycle with Tam but I think its too late, and it hurts a lot to think that, more than it would have with my past crushes.

TL;DR
I got the perfect oppurtunity to talk to my crush and get her number. But I chickened out and left. I don’t think I’ll ever get another chance. This stuff happened with all my past crushes and I dont know how to break the cycle. I want to my current crush to be the first but I think it may be too late and it hurts a lot to even think about that being the possibility.

Is it too late? How do I start breaking this cycle? How can I get up the courage to talk to Tam? Or is it just time to move on from her?